| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [subord] at the same time maintain | 9 |
|
| 2 | [conj] at the same time maintaining | 8 |
|
| 3 | while at the same time maintain | 7 |
|
| 4 | while at the same time maintain | 7 |
|
